You'll trip on this one...
#1
Rotary Enthusiast
Thread Starter
You'll trip on this one...
Thanks to "Coop" on the forum I have got a TE wideband lambda (O2).
The great folks at Gotham pretuned my PFC plenty rich. I did a run in fourth gear.
Was good on the AFRs until 5.8k-6K Rs and above when the AFRs went into the 13s
So I added and added fuel on the PFC from 4k and up till the PIM value went from 100% to 149.66% and still the AFRs where in the 13s right at 6k and above. The fuel was being added 'cause the Rs started to bump from being to rich.
I have a Supra TT and -8an billet Al K&N filter with glycerin filled pressure guage. Seems right above 6k I am having problems no matter how much fuel. Imjector have been flowed and balanced by RC twice to check for problems.
Thanks for your feedback and btw, a new supra TT pump is on the way.
The great folks at Gotham pretuned my PFC plenty rich. I did a run in fourth gear.
Was good on the AFRs until 5.8k-6K Rs and above when the AFRs went into the 13s
So I added and added fuel on the PFC from 4k and up till the PIM value went from 100% to 149.66% and still the AFRs where in the 13s right at 6k and above. The fuel was being added 'cause the Rs started to bump from being to rich.
I have a Supra TT and -8an billet Al K&N filter with glycerin filled pressure guage. Seems right above 6k I am having problems no matter how much fuel. Imjector have been flowed and balanced by RC twice to check for problems.
Thanks for your feedback and btw, a new supra TT pump is on the way.
#2
Original Gangster/Rotary!
iTrader: (213)
Re: You'll trip on this one...
Originally posted by cover8
Thanks to "Coop" on the forum I have got a TE wideband lambda (O2).
The great folks at Gotham pretuned my PFC plenty rich. I did a run in fourth gear.
Was good on the AFRs until 5.8k-6K Rs and above when the AFRs went into the 13s
So I added and added fuel on the PFC from 4k and up till the PIM value went from 100% to 149.66% and still the AFRs where in the 13s right at 6k and above. The fuel was being added 'cause the Rs started to bump from being to rich.
I have a Supra TT and -8an billet Al K&N filter with glycerin filled pressure guage. Seems right above 6k I am having problems no matter how much fuel. Imjector have been flowed and balanced by RC twice to check for problems.
Thanks for your feedback and btw, a new supra TT pump is on the way.
Thanks to "Coop" on the forum I have got a TE wideband lambda (O2).
The great folks at Gotham pretuned my PFC plenty rich. I did a run in fourth gear.
Was good on the AFRs until 5.8k-6K Rs and above when the AFRs went into the 13s
So I added and added fuel on the PFC from 4k and up till the PIM value went from 100% to 149.66% and still the AFRs where in the 13s right at 6k and above. The fuel was being added 'cause the Rs started to bump from being to rich.
I have a Supra TT and -8an billet Al K&N filter with glycerin filled pressure guage. Seems right above 6k I am having problems no matter how much fuel. Imjector have been flowed and balanced by RC twice to check for problems.
Thanks for your feedback and btw, a new supra TT pump is on the way.
take it easy--
#3
Your fuel system is inadequate somehow, whether its the filter, pump, injectors, rail, or lines.
Your running out of fuel on the top end, and the PFC is trying to add fuel but your system cannot push any more fuel into the motor. What mods do you have to the motor and more specifically the fuel system.
This is all how I see it anyways. My guess is that your problem will go away when you get your new pump in.
Your running out of fuel on the top end, and the PFC is trying to add fuel but your system cannot push any more fuel into the motor. What mods do you have to the motor and more specifically the fuel system.
This is all how I see it anyways. My guess is that your problem will go away when you get your new pump in.
#4
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Join Date: Jan 2003
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Originally posted by Kaotic Dan
My guess is that your problem will go away when you get your new pump in.
My guess is that your problem will go away when you get your new pump in.
I'm surprised you didn't blow your motor at 13:1, that's waaaay to lean. What all is in your fuel system?
#7
Rotary Enthusiast
Thread Starter
I have ordered a new pump from Gotham (per Steve's recommendation)...same pump Supra TT but brand damn new.
A forum member posted just a few days back about the billet K&N had too much pressure drop and was leaning out at high RPMs so he removed the K&N and went with Aeromotive (or is it Aeroquip?).
Obviously, I am fuel starving and will start by replacing the fuel pump ASAP and I do stay below 6k on the tach.
Doesn't the motor run two voltage settings? Maybe i am not going to the second voltage setting? Just curious cause with my luck I will install a new fuel pump and it will still have this problem.
Thanks so much for your feedback and Steve at Gotham has been very supportive technically especially as busy as he has been he has always found the time to help me.
A forum member posted just a few days back about the billet K&N had too much pressure drop and was leaning out at high RPMs so he removed the K&N and went with Aeromotive (or is it Aeroquip?).
Obviously, I am fuel starving and will start by replacing the fuel pump ASAP and I do stay below 6k on the tach.
Doesn't the motor run two voltage settings? Maybe i am not going to the second voltage setting? Just curious cause with my luck I will install a new fuel pump and it will still have this problem.
Thanks so much for your feedback and Steve at Gotham has been very supportive technically especially as busy as he has been he has always found the time to help me.
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#9
Original Gangster/Rotary!
iTrader: (213)
Originally posted by cover8
Also I think with my mods (all bolt ons) the 850cc secondaries should be enough, no?
Also I think with my mods (all bolt ons) the 850cc secondaries should be enough, no?
http://www.maxcooper.com/rx7/how-to/...tem/calcs.html
#10
Rotary Enthusiast
Thread Starter
Cannot run to redline because of the 6k AFRs But I could use the peak hold function on the display...Maybe I need 1300cc's? With my mods I should be around >=30rwhp
CAI, full exhuast, PFC, 8.5#flywheel, 99spec twins, m2SMIC, stock injectors, supra TT, 13-14psi
Maybe I am at my secondary limits?
CAI, full exhuast, PFC, 8.5#flywheel, 99spec twins, m2SMIC, stock injectors, supra TT, 13-14psi
Maybe I am at my secondary limits?
Last edited by cover8; 07-13-03 at 12:47 PM.
#12
Rotary Enthusiast
Thread Starter
Did a run using the PFC map function on the commander (until I get the laptop for the datalogit) and right around 70% duty cycle I start getting very lean...this is crazy! R/C said the injectors are perfect. Should do better than 70%?!
Definitely getting to my wits end with this car...lots of money and very little performance return...just f**king headaches.
Tell me I bought a fuel pump that was bad...
Definitely getting to my wits end with this car...lots of money and very little performance return...just f**king headaches.
Tell me I bought a fuel pump that was bad...
Last edited by cover8; 07-13-03 at 03:00 PM.
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